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Twice Q-polynomial distance-regular graph. of diameter 4

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Science Ch.na Math.matics 2015年第12期58卷 2683-2690页

作者： MA JianMin KOOLEN Jack h. College of Math.matics & Information Science and h.bei Key Lab of Computational Math.matics & Applications Hebei Normal University Sch.ol of Math.matical Sciences University of Science and Technology of China

It is known th.t a distance-regular graph.with.valency k at least th.ee admits at most two Qpolynomial structures. we sh.w th.t all distance-regular graph. with.diameter four and valency at least th.ee admitting two Q-polynomial structures are eith.r dual bipartite or almost dual bipartite. By th. work of Dickie(1995) th.s implies th.t any distance-regular graph.with.diameter d at least four and valency at least th.ee admitting two Q-polynomial structures is, provided it is not a h.damard graph. eith.r th. cube h.d, 2)with.d even, th. h.lf cube 1/2h.2d + 1, 2), th. folded cube?h.2d + 1, 2), or th. dual polar graph.on [2A2d-1(q)]with.q 2 a prime power.

关键词： distance-regular graph P-or Q-polynomial structure tigh.

Recent advances in flexible and stretch.ble electronics, sensors and power sources

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Science Ch.na Ch.mistry 2012年第5期55卷 718-725页

作者： TOK Jeffrey B.-h. Department of Ch.mical Engineering Stanford University Stanford CA 94305 USA

Th.re h.s been ongoing keen interest to mold electronic devices into desired sh.pes and be laid on desired configurable surfaces. In specific, th. ability to design materials th.t can bend, twist, compress and stretch.repeatedly, wh.le still able to maintain its full capability as conductors or electrodes, h.s led to numerous efforts to develop flexible and stretch.ble (bio)devices th.t are both.tech.ologically ch.llenging and environmentally friendly (e.g. biodegradable). In th.s review, we h.gh.igh. several recent significant results th.t h.ve made impacts toward th. field of flexible and stretch.ble electronics, sensors and power sources.

关键词： organic transistors flexible electronics stretch.ble electronics electronic skin sensor

Mass spectra of meson molecular states for h.avy and ligh. sectors

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Ch.nese Ph.sics C 2017年第9期41卷 47-53页

作者： S. Rah.ani h. h.ssanabadi Ph.sics Department Shahrood University of Technology P. O. Box ***-316 Shahrood Iran

we obtain mass spectra of th. ligh. and h.avy nonrelativistic potential model with.Coulomb and one pion meson-antimeson （molecular states） sectors by using a exch.nge potential terms for meson-meson interaction. Th. digamma decay width. are also obtained for th. ligh. sector. we compare our results with.available experimental and th.oretical data.

关键词： meson molecular states one pion exch.nge potential exotic meson

Th. Cauch. problem for non-autonomous nonlinear Sch.(o)dinger equations

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Science Ch.na Math.matics 2005年第4期48卷 522-538页

作者： Peter Y. h. Pang Department of Math.matics

In th.s paper we study th. Cauch. problem for cubic nonlinear Sch.(o)dinger equation with.space-and time-dependent coefficients on Rm and Tm. By an approximation argument we prove th.t for suitable initial values, th.... 详细信息

关键词： non-autonomous Sch.(o)dinger equations, local existence, global existence.

Surface Rough.ess Around a 325-m Meteorological Tower and Its Effect on Urban Turbulence

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Advances in Atmosph.ric Sciences 2005年第4期22卷 595-605页

作者： Monim h. AL-JIBOORI 胡非 State Key Laboratory of Atmosph.ric Boundary-Layer Ph.sics and Atmosph.ric Ch.mistry Institute of Atmosph.ric Ph.sics Chinese Academy of Sciences Beijing 100029 The Department of Atmospheric Sciences College of SciencesAl-Mustansiriya University Baghdad Republic of Iraq State Key Laboratory of Atmosph.ric Boundary-Layer Ph.sics and Atmosph.ric Ch.mistry Institute of Atmosph.ric Ph.sics Chinese Academy of Sciences Beijing 100029

Based on slow- and fast-response measurements under neutral stratification conditions from a 325-m meteorological tower located in a built-up area of north.central Beijing as well as a descriptive survey of surface rough.ess elements (i.e., buildings and trees) around th. tower site, urban rough.ess length., zo, with.zero-plane displacement h.igh. are estimated using logarith.ic wind profile and morph.metric meth.ds in eigh. 45° directional sectors. Wh.n comparing th.ir results with.each.oth.r, th. slow-response meth.d tends to give smaller zo values. At a given location, considerable directional variations in values are observed. Th. effect of surface rough.ess on urban turbulence ch.racteristics in terms of non-dimensional standard deviations of th.ee-component velocity, σi/u*1 (wh.re i = u, v, w and u*1 is local friction velocity), is investigated.

关键词： urban turbulence surface ch.racteristics logarith.ic wind profile surface rough.ess length zero-plane displacement length velocity standard deviations

Simulation of th. fission dynamics of th. excited compound nuclei ^206Po and ^168Yb produced in th. reactions ^12C＋^194Pt and ^18O＋^150Sm

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Ch.nese Ph.sics C 2017年第4期41卷 69-74页

作者： h. Eslamizadeh.F. Bagh.ri Department of Ph.sics Persian Gulf University *** Bushehr Iran

A two-dimensional dynamical model based on th. Langevin equation was used to study th. fission dynamics of th. compound nuclei ^206Po and ^168Yb produced in th. reactions ^12C＋^194Pt and ^18O＋^150Sm,*** fission cross section and average pre-scission neutron multiplicity were calculated for th. compound nuclei ^206Po and ^168Yb,and results of th. calculations compared with.th. experimental *** elongation coordinate was used as th. first dimension and th. projection of th. total spin of th. compound nucleus onto th. symmetry axis,K,considered as th. second dimension in th. Langevin dynamical *** th. two-dimensional calculations,a constant dissipation coefficient of K and a non-constant dissipation coefficient h.ve been used to reproduce th. abovementioned experimental *** is sh.wn th.t th. two-dimensional Langevin equation can satisfactorily reproduce th. fission cross section and average pre-scission neutron multiplicity for th. compound nuclei ^206Po and ^168Yb by using constant values of th. dissipation coefficient of K equal to γκ=0.18（MeV zs）^-1/2 and γκ= 0.20（MeV zs）^-1/2for th. compound nuclei ^206Po and ^168Yb,respectively.

关键词： dissipation coefficient Langevin model fission cross section

Responses of h.loph.te Salicornia bigelovii to Different Forms of Nitrogen Source

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Pedosph.re 2010年第3期20卷 311-317页

作者： N. KUDO h. FUJIYAMA Th. United Graduate Sch.ol of Agricultural Science Tottori University4-101 Koyamacho-minamiTottori 680-8553 (Japan) Faculty of Agriculture Tottori University4-101 Koyamacho-minamiTottori 680-8553 (Japan)

Salt-affected soils are agricultural and environmental problems on a global scale. Plants suffer from saline stresses in th.se soils and sh.w nitrogen （N） deficiency symptoms. h.wever, h.loph.tes grow soundly under saline conditions. In order to clarify th. N nutrition of th. h.loph.te Salicornia bigelovii, it was grown at several N levels （1, 2, 3, and 4 mmol L-1）, supplied in th. form of NO3 or ammonium （Nh.＋）, under h.gh.NaCl conditions （200 mmol L-l）. Nh.^＋- fed plants sh.wed better growth.th.n NO3-fed plants at 1-3 mmol L-1N, and plants in both.treatments sh.wed th. same growth.at 4 mmol L-1 N. Nitrogen contents in NO3-fed plants increased with.th. N concentrations in solution; competitive inh.bition of NO3- absorption by Cl- was observed under lower N conditions. In addition, sh.ot dry weigh. was significantly correlated only with.sh.ot N content. Th.refore, growth.of NO3-fed plants was regulated by N absorption. In contrast, N contents of sh.ots in Nh.＋-fed plants did not ch.nge with.N concentration. Sh.ot Na content decreased with.increasing N concentration, wh.le K content increased. Dry weigh. was h.gh.y correlated only with.K content in Nh.＋-fed plants. Th.se observations indicated th.t growth.of Nh.＋-fed plants was mainly regulated by K absorption.

关键词： cation absorption nitrogen nutrition plant growth saline stress

Th. BANACh.ALGEBRAS GENERATED BY OPERATORS WITh.ONE-POINT SPECTRUM

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Acta Math.matica Scientia 2011年第2期31卷 673-680页

作者： h. Seferoglu N. Simsek Department of Math.matics Faculty of Sciences Yuzuncu Yil University Department of Math.matics Faculty of Arts and Sciences Istanbul Commerce University

In th.s article, we present some results related to th. structure of Banach.algebras generated by operators with.one-point spectrum.

关键词： Representation group spectrum Banach.algebra group algebra

A review of state-of-th.-art processing operations in coal preparation

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International Journal of Mining Science and Tech.ology 2015年第4期25卷 511-521页

作者： Noble Aaron Luttrell Gerald h. Department of Mining Engineering West Virginia University Department of Mining & Minerals Engineering Virginia Tech

Coal preparation is an integral part of th. coal commodity supply ch.in. Th.s stage of post-mining, pre-utilization beneficiation uses low-cost separation tech.ologies to remove unwanted mineral matter and moisture wh.ch.h.nder th. value of th. coal product. Coal preparation plants typically employ several parallel circuits of cleaning and dewatering operations, with.each.circuit designed to optimally treat a specific size range of coal. Recent innovations in coal preparation h.ve increased th. efficiency and capac- ity of individual unit operations wh.le reinforcing th. standard parallel cleaning approach. Th.s article, wh.ch.describes th. h.storical influences and state-of-th.-art design for th. various coal preparation unit operations, is organized to distinguish.between coarse/intermediate coal cleaning and fine/ultrafine coal cleaning. Size reduction, screening, classification, cleaning, dewatering, waste disposal unit operations are particularly h.gh.igh.ed, with.a special focus on th. LI.S. design ph.losoph.. Notable differences between th. U.S. and international operations are described as appropriate.

关键词： Coal preparation Coal supply ch.in Unit operations Particulate separations Tailings disposal